Pipe-coupling.



F. C. PAHLOW. PIPE CGUPLIN G. APPLIoATIon FILED MAY 22,1908.

949,329. Patented Feb. 15,1910.

DRE? C12/0 @Il Q l 9 o C, f

A EQ;E. f C' Figi 7" y 8 4 Z Z y uff'nesses 'y f/U/enor C fit 4,known that I,4 FRANK C. PaHLoW, lagcitize'nl'of the :United- States vof 'America, f residing at Detroit, lin the'countyof lVaynel 1'- and State' of.' Michigan, have invented cer- I tain new- 'and "useful Improvements in PipefvCoupling's, ofvwhich the following is a specir-'catlonfreferenee'being had therein to the accompanying drawings.

. The invention relates to av coupling for donnecting a pipe or hose with a source of fluid su ply,-the invention being in this instance esig'ned for use in connection WithV pneumatic tools, and'it consists in the novel construction of a coulpling'of this type provided with a normal y seatedfvalve topprevent the escape of a1r and adapted to be 1s an end view thereof; and lFig. 3 is a vertical central section through a modification.

In Figs. 1 and 2 of the drawings I have shownxa coupling especiallyv designed for ,connecting a hose leading tol a. pneumatic tool with-a source of air supply, the reference-letter A designating the hose and B the supply pipe. C represents the coupling. In construction, the latter comprises a sectional -Valve casing D, one of the members or sections E carrying the valve F, and the'section G the valve seat H, the sections having a screw-threaded engagement one with the other, as illustrated. Thef section E of the casing is provided with a nipple I adapted to engage the pipe B leadingl to the source of sup ly, and internally With a spider frame (lp, centrally apertured, as at a, to form a tubular 'bearing for the stem K of the valve'ld. I preferably interpose between the valve proper and the bearing described a coil spring L which serves to hold the valve normally, toits'c seat,thus reventing the escape of air. rllhe valve casing described is preferably formed with a tubular extension M internally screw-threaded, as at b, at its t outer end, and Athe valve F is formed with a tubular extension c which projects Within f:f rig.anxflcl.,raintow,'orbariton', MICH'IGANfAsSIGNon oF-onnatiofanronio c.-

- 14.5'-'lESSeNe- OF DETROIT,'111931,cam;l 1

' the casing. extension inthe I ath of thejcomby said sectiondurmg tie opera- .plementaryI plpe section, an is ada ted to be l operated tion of couplin 'The valve extension def' scribed is provi ed with a plurality of ports v 'd through which the air passes from the snply when the valve is raised vfrom v-its seat.

itted within the end of the pipeA leadingl to the tool is a tapered thimble O, and encirclin the' pipe end is a correspondingly tapere wedge ring P, the parts actingconjointly to form a clamp for the` free end of the pipe, as shown. Q represents' a tubulaicoupling member provided with a shoulder e adapted to engage the rear end` of Wedge ring, and with a reduced and externally threaded end R adapted u on coupling to engage the internal threa casmg end.

In practice, the valve casing 1s screwed upon the pipe leading' to the air supply, and the valve elther through its spring or.v the air pressure is held to its seat, preventmg the escape of air. The tubular clamp is applied to the end of the hose in such manner that the latter will project slightly beyond the clamp, as shown in Fig. 1, the projecting portion bearing during the operation of coupling against a shoulder a on the valve casing, forming a packing or gasket intermediate the sections to be coupled. vThe coupling member Q of the coupling cngages both the wedge ring of the clamp, and

the valve casing forcing the hose section A during'the o eration of coupling into en- Gagement wit the valve extension, thereby Iorming a tight joint between the parts, while the longitudinal movementimpart'ed to the hose raises the valve from its seat. Thus, as the coupling-is effected the valve 1s operated and the necessary passage is probcili thev the vided leading from the' source of air supply to the tool to be operated.

In Fig. 3 I have shown a modified Aform of coupling designed for direct attachment to 'the tool or with the metallic pipe leading to the tool. The valve casing in this instance isof the sectional construction as prevlously described, and is provided interior-ly with anannular shoulder S, recessed as at T, in which is seated a suitable gasket U., The section of piping V leading to the tool carries at its meetin end a tubular internally threaded member and a similar member first-mentioned member,'and provided at its extendingv intermediate the member X and end with `an outwardly extending annular flange Y'insertible within the outlet of -thev casing and"'adapted upon coupling to abut against'the gasket U. Mounted upon the' member X is a coupling ringZ having a suitable wrench-hold formed upon its exterior to permit of its operation, and carrying an externally threaded reduced section Z the valve casing, and' having-a threaded engagement with the latter, as illustrated. As the coupling is effected by the-rotation of the coupling ringfthe member X is vforced a suiiicient distance within the valve casing to expand the gasket and to force the valve from its seat, the valve extension projecting normally beyond the gasket for this purose. p When it is desired to uncouple the membersA and B, if the pressure in (the member A is high, when the nut Q is nearly unscrewed from the tubular extension M, unless some means is provided for permitting the escape of the fluid in the member A, the threads on one or both of said members would be badly torn, if not entirely stripped therefrom., I therefore provide a vent or relief port A2 in the extension M, which is so positioned as to be normally closed by the threaded end R of the member Q, and to be opened upon the end R being unscrewed 'sufficiently to permit the valve to seat.

What I claim as my .invention is,---4 1'. In a coupling, the'combination with two Y conduit sections, of a sectional .Valve casing connecting said conduit sections comprising a member engaging one of the 'conduit sections and having an externally outer end, a second member having its ends internally threaded and having a reduced port-,ion intermediate its ends forming a valve seat, one of the ends-of said second member engaging .the externally threadedouter'end of'said first-mentioned. member, a valve engaging lsaid seat, a .spring for norl mally holding the valve to its seat, said valve having a portion extending beyond said reduced portion when the valve is closed, va tapering thimble seated entirely within the other conduit section, a wedge ring encir` V clingsaid section over said thimble forming@ in connection therewith .a tubular cla-mp, and

a .coupling member for,- connecting the clamp tubular nut proto the casing comprising a vided with a shoulder abutting against the outer end of the wedgering and a reduced externally threaded portion adapted to enthreaded gage the internal thread of the other/end'of said second member.

2.y In a coupling, the combinationwith two conduit sections, of a sectional valve casing connecting said conduit sections comprising a member having one of its ends "internally threaded to engage one of the conduit sections, and a reduced externally threaded portion on its outer end and a centrally apertured spider frame carried by said reduced portion, a second member h avlng its ends internally threaded'and havin a-'lreduced portionintermediate its ends orming a valve seat, one of said endsengaging the reduced externally threaded portion of said rst- 'i coupling member for connectin the clamp to the casing comprising a tubu ar nut. provided with a shoulder abutting against the outer end ofthe Wedge ring, and a reduced 'externally threaded section adapted to lengage the internal thread of the other end of said second member. 7

3. vIn a coupling, the -combination -vwith two conduit sections, of a valve casing con- `niected to one of said conduit sections having an internally-threaded tubular extension, and -a portion of smaller diameter at the inner end' df said internally-threaded exj tension forming a bearing, a tapering thimble seated entirely within the other conduit section, a wedgerin encircling said sectionv over said thimble orming in connection therewith a tubular clamp, the end4 of the conduit protrudin slightly beyond said clamp, and .a couping member for connecting the clamp to the casing comprising a tubular `nut provided with a shoulder abutting against the outer end of thewedge vring and a reduced externally-threaded section engaging the internal-'thread of the. tubular extension :and clamping the protruding end of the "conduit firmly against said bearing.

whereoii I aiix my signature In testimony in-presence of two witnesses. v

. FRANK C. PAIUJOW. f

Witnesses:

DWIGHT TRUE,

, CHARLES SHORT. 

